Origin of pseudo-dispersion in non-dispersive media by terahertz time-domain spectroscopy

被引：1
作者：
Vandrevala, Farah [1 ]
Einarsson, Erik [1 ,2 ]
机构：
[1] Univ Buffalo, Dept Elect Engn, Buffalo, NY 14260 USA
[2] Univ Buffalo, Dept Mat Design & Innovat, Buffalo, NY 14260 USA
来源：
OPTICS EXPRESS | 2019年 / 27卷 / 23期
关键词：
GRAPHENE; INDEX;
D O I：
10.1364/OE.27.033537
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
We report the false appearance of dispersion in non-dispersive materials when measured by terahertz time-domain spectroscopy. This occurs when the material is measured in reflection geometry and has a bulk metal interface opposite to the incident interface, for example, when a substrate is supported by a metal stage with the THz light incident on it from above. We explain this effect in terms of the frequency-dependent response of the material when it is represented by a shorted transmission line model. (C) 2019 Optical Society of America under the terms of the OSA Open Access Publishing Agreement
引用
收藏
页码：33537 / 33542
页数：6
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